75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
/*
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* linux/drivers/mfd/ucb1x00-assabet.c
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*
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* Copyright (C) 2001-2003 Russell King, All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License.
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*
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* We handle the machine-specific bits of the UCB1x00 driver here.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/proc_fs.h>
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#include <linux/device.h>
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#include <linux/mfd/ucb1x00.h>
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#include <mach/dma.h>
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#define UCB1X00_ATTR(name,input)\
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static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \
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char *buf) \
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{ \
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struct ucb1x00 *ucb = classdev_to_ucb1x00(dev); \
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int val; \
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ucb1x00_adc_enable(ucb); \
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val = ucb1x00_adc_read(ucb, input, UCB_NOSYNC); \
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ucb1x00_adc_disable(ucb); \
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return sprintf(buf, "%d\n", val); \
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} \
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static DEVICE_ATTR(name,0444,name##_show,NULL)
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UCB1X00_ATTR(vbatt, UCB_ADC_INP_AD1);
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UCB1X00_ATTR(vcharger, UCB_ADC_INP_AD0);
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UCB1X00_ATTR(batt_temp, UCB_ADC_INP_AD2);
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static int ucb1x00_assabet_add(struct ucb1x00_dev *dev)
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{
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device_create_file(&dev->ucb->dev, &dev_attr_vbatt);
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device_create_file(&dev->ucb->dev, &dev_attr_vcharger);
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device_create_file(&dev->ucb->dev, &dev_attr_batt_temp);
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return 0;
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}
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static void ucb1x00_assabet_remove(struct ucb1x00_dev *dev)
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{
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device_remove_file(&dev->ucb->dev, &dev_attr_batt_temp);
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device_remove_file(&dev->ucb->dev, &dev_attr_vcharger);
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device_remove_file(&dev->ucb->dev, &dev_attr_vbatt);
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}
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static struct ucb1x00_driver ucb1x00_assabet_driver = {
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.add = ucb1x00_assabet_add,
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.remove = ucb1x00_assabet_remove,
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};
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static int __init ucb1x00_assabet_init(void)
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{
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return ucb1x00_register_driver(&ucb1x00_assabet_driver);
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}
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static void __exit ucb1x00_assabet_exit(void)
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{
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ucb1x00_unregister_driver(&ucb1x00_assabet_driver);
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}
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module_init(ucb1x00_assabet_init);
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module_exit(ucb1x00_assabet_exit);
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MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
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MODULE_DESCRIPTION("Assabet noddy testing only example ADC driver");
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MODULE_LICENSE("GPL");
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